Tire-cutting tool



March 24, 1925. 1,530,794

F. G. SWAN TIRE CUTTINC; TOOL Filed April 50, 1924 lNVEl VTOR fVayd 6.6400 ATTREY Patented Mar. 24, 1925.

UNITED STATES FLOYD GILLETTE SWAN, on EUREKA, CALIFORNIA.

TIRE-CUTTING TOOL.

Application filed April 30, 1924. Serial No. 710,148.

To all whom it may concern:

Be it known' that I, FLoYn Grnmrr'rn SWAN, a citizen of the UnitedStates, residing at Eureka, in the county of Humboldt and State ofCalifornia, have invented certain new and useful Improvements inTire-Cutting Tools, of which the following is a specific'ation. r

My invention relates to that class of tools employed for cutting therubber of pneumatic tires in order to enable the same to be separatedfrom the fabric or to separate one layer of fabric from another.

The invention has for its object to provide such a tool of a simple andeffective construe-- the projection of the blade may be increased o1diminished to enable the material to cut through one or more thicknessesof the fab ric as maybe desired; My tool also provides a meanswherebythe fabrio'may be started loose after the out has been made.

, In its more subordinate nature the invention resides in those noveldetails of construction, combination and arrangement of parts, all ofwhich will be first fully described, then be specifically pointed out inthe appended claims and illustrated in the accompanying drawii'lg, inwhich l igure 1 is a side elevation of my tool.

Figure 2 is a top plan view of the same;

Figure is an inverted plan view of a portion of my tool. 7

Figure 4. is an end elevation of the portion shown in Figure 3.

Figure 5 is a vertical cross section on the line 5-5 on Figure 1.

Figure 6 is a section on the line 66 of Figure 5 looking in thedirection of the arrow, the adjusting screw and knife blad beingomitted.

Figure 7 is an elevation ofthe removable face of the shank 1.

clamp plate which forms the complementary part of the structure shown inFigure 6.

Figure 8 is a detail elevation of theknife blade.

In the drawing, in which like numerals of reference designate like partsin all the ures, 1 is the shank of the tool which, is curved upwardlyand projected rearwardly to carry the handle 18 hereinafter again referred to. i

The shank 1 of the tool is provided with a vertical extension 2 that hasan overhanging portion 3 beneath which the clamp plate 6 is located, theshank 1 being recessed at 4: to receive the clamp plate 5, the parts 2.6, 4 and 5 being complementary parts. The shank 1 and its extension 2have vertical grooves 8 to receive the corresponding ribs 7 of the clampplate 5. The surfaces 10 and 11 of the complementary parts are separateda distance sufficient to receive the thin waferlike blade 12, the loweredge of which is rounded and sharpened to a thin edge, while the upperend of which is provided with a T-slot 13 to receive the T-head 1 1 oftheadjusting screw 15.

The complementary parts 2 and 6 are provided with a thread-way 9 toreceive the screw 15, which screw includes the head 16 by which it maybe turned to raise or lowerthe blade 12 and thereby retract orprojectthe cutting edge thereof beneath the lower The nose 21 oflthe shankpreferably rounded as indicated to facilitatethe useofthe tool. o

It will be noted that the thread-way 9 goes through the overhangingportion 3 which thereby forms a screw bearing for the screw to retain itin place when the clamp plate 5" is loosened or removed for thepurpose/of adjusting or' changing the blade.

The clamp plate 5 is secured by suitable countersunk screws 17 to theshank 1., and by tightening'these screws 17, asufiicient gripping actionis had not only on the threads of the screw 15 but on the blade 1-9itself to hold the blade against movement in. the socket providedbetween the surfaces 10 and 11 and the ribs 77. To adjust the blade itis only necessary to ease up on the screws 17, turn the screw head 16until the blade edge is projected the desired distance 1 The shank 1'may be extended through the handle 18 and curved downwardly, as at 19,and provided with a sharpened trowel-like blade 20 which can be used toget under the layers of fabric and loosen them up after the out has beenmade through the rubber or rubber and fabric thicknesses in the usualway. i

From the foregoing description, taken in connection with theaccompanying drawing, it is thought the construction, operation andadvantages of my invention will be clear to those skilled in the art towhich it appertains.

What I claim is:

1. In a tool of the character stated, a shank having a verticalprojection and a recessed portion, a complementary clamp plateassociated with said recessed portion and said projection, said recessedportion and said projection and said clamp plate having a pair of riband groove portions arranged to leave a knife chamber therebetween, saidclamp plate and said vertical projection of the shank havingathread-way,an adjusting screw mounted in said thread-way, a blade held in saidknife chamber and adapted to be engaged by said screw, and means forsecuring the clamp plate to the shank to grip the blade.

2. In a tool of the character stated, a

shank having a vertical projection and a re-' cessed portion,acomplementary'clamp plate associated with said recessed portion andsaid projection, said recessed portion and said projection and saidclamp plate having a pair of rib and grooveportions arranged clamp plateand said vertical projection of the shank having a thread way, anadjusting screw mountedin said thread-way, a'blade held in said knifechamber and adapted to be engaged by said screw, and means for securingthe clamp plate. to the shank to grip the blade, said screw having aT-end and said knife having a T-slot to receive said,

to leave a knife chamber therebetwoen, said clamp plate and saidvertical projection of the shank having a thread-Way, an adjusting screwmounted n said thread-way, a

i blade held in said knife chamber and adapted to be engaged by saidscrew, and means fol-securing the clamp plate to the shank to griptheblade, said projection having a porshank having a vertical projectionand a recessed portion, a complementary clamp plate associated wlth sa1drecessed portion and sa1d pro ection, sa1d recessed portion and-saidprojection and said clamp plate having a pair of rib and grooveportions arranged to leave a knife chamber therebetween, sa1d clampplate and said vertical projection of the shank having a thread-way, anadjusting screw mounted in said thread-way, a blade held in said knifechamber and adapted to be engaged by said screw, and means for securingthe clamp plate to the shank to grip the blade, said screw having aT-end and said knife having a T-slot to receive said T-end, saidprojection having a portion overhanging said clamp plate and providedwith a threaded aperture for said adjusting screw. i t

5.. In a tool of the character stated, a shank having a verticalprojection and recessed to provide an overhanging portion, acomplementary clamp said shank to lie insai recessed portion beneathsaid overhanging portion, said vertical projection and said clamp platehaving a thread-way and said overhanging portion having a threadedaperture aligning with said thread-way, an adjusting screw mounted insaid aperture and thread-way and having a T end, a wafer blade mountedbetween said shank and said clamp plate and V having a Teslot to receivethe T-end of said to leave a knife chamber therebetween, sa1d screw,n1eans for securing said clamp plate to the shankto grip the blade,substantially as-shown and described.

6. In a tool of the character stated, a

shank having a vertical projection and recessed to provide anoverhanging portion, a complementary clamp late associated with saidshank to lie in saic recessed portion beneath said overhanging portion,said vertical projection and said clamp plate having a thread-way andsaid overhanging portion having a threaded aperture aligning with saidtln'ead-\vay, an adjusting-screw mount- I ed in said aperture andthread-way and having a T-end, a wafer blade mounted between said shankand sa1d clamp plate and having a T-slot to receive the T-cnd. ofsaidscrew,

means for securingisaid clamp plate to the.

shank to grip the blade, said shank and its vertical. projection havinga pair of parallel vertical grooves and said adjusting clamp platehaving a correspondmg pair of ribs, between wlnch pair of ribs theknii'e blade 1s located. I it i FLOYD GILLETTE SWAN.

(plate associated with

